ATI RN
Immune System Exam Questions Questions
Question 1 of 5
Which of the following statements best describes the classical complement pathway effector function?
Correct Answer: D
Rationale: The classical pathway, triggered by antibodies, promotes inflammation, lysis (via MAC), and opsonization (via C3b), making all options correct.
Question 2 of 5
CD8 co-receptors:
Correct Answer: C
Rationale: CD8+ T cells (~35%) interact with MHC1, not MHCII; CD4 marks helper T cells.
Question 3 of 5
Pregnancy test detects the presence of which of the following?
Correct Answer: B
Rationale: Pregnancy tests detect HCG , a hormone; Rh , proteins , or agglutination are unrelated.
Question 4 of 5
Contact with poison ivy would elicit which type of hypersensitivity reaction?
Correct Answer: D
Rationale: Poison ivy causes Type IV , T-cell-mediated; not immune complex , IgE , or cytotoxic .
Question 5 of 5
Which of the following immunoglobulin has the highest avidity of the immunoglobulins?
Correct Answer: B
Rationale: IgM has high avidity due to pentameric structure; others (A, C, D) have lower avidity.